The Head Assembly Piston, cataloged under National Stock Number 1650-00-004-9715, is classified within Federal Supply Class 1650 (Aircraft Hydraulic, Vacuum, and De-icing System Components) of the Aircraft Components and Accessories group. The manufacturer of record is Triumph Actuation Systems, Llc Div Triumph Actuation Systems - Freeport. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1650-00-004-9715 |
| Primary Part Number | A51H30529-1 |
| Item Name | Head Assembly Piston |
| FSC / FSG | 1650 / 16 — Aircraft Hydraulic, Vacuum, and De-icing System Components |
| Manufacturer | Triumph Actuation Systems, Llc Div Triumph Actuation Systems - Freeport |
| Status | ACTIVE |
| General Characteristics Item Description | ALUMINUM ALLOY; 9.495 IN. DIA; 0.583 IN. DIA FROM INSIDE CORNER TO CORNER; 0.020 IN. MIN 0.030 IN. MAX RADIUS IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| A51H30529-1 | Triumph Actuation Systems, Llc Div Triumph Actuation Systems - Freeport (USA) |
| Reference | Meaning |
|---|---|
| A51H30529-1 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
| A51H30529 | D/9 Drawing number reference only Northrop Grumman Systems Corporation |
| A51H30529-1 | 3/9 Design control — primary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems |
| A51H30529-1 | C/1 Advisory reference — outside the item-of-supply concept Northrop Grumman Systems Corporation |
NSN 1650-00-004-9715 is a Head Assembly Piston, manufactured by Triumph Actuation Systems, Llc Div Triumph Actuation Systems - Freeport, classified under FSC 1650, Aircraft Hydraulic, Vacuum, and De-icing System Components. Status: active.
NSN 1650-00-004-9715 has 1 manufacturer part number on file: A51H30529-1 (Triumph Actuation Systems, Llc Div Triumph Actuation Systems - Freeport).
Key specifications for A51H30529-1: General Characteristics Item Description: ALUMINUM ALLOY; 9.495 IN. DIA; 0.583 IN. DIA FROM INSIDE CORNER TO CORNER; 0.020 IN. MIN 0.030 IN. MAX RADIUS IN. 1 specification is documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 1650-00-004-9715 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.